On Thu, 22 Sep 2005 12:25:09 +0100, MattH wrote:


I have recently moved into a larger house and am having soem problems
with the radiators not getting hot, i have tried balancing which has
helped but really my question is, is the pump i have strong enough. The
house has 23 radiators of which 18 are large doubles, the pump is a
grundfos 15/60, which i understand is a powerful domestic model, but i
cant help thinking isnt up to the job.

Can anyone advise whether i can install a more powerful version, if so
what, or how can i check that this is strong enough, i cant help
feeling it isnt.

If the rads are not getting hot - then the question is what is the boiler
doing.

A) Flat out alway s running - i.e. it's not powerfull enough for the 23
rads.
OR
B) The boiler is getting very hot but there is not distribution of the
heat to the rads this can be any number of problems. And 'pump needs
to be bigger' is at the end of the list.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html